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                            ## 總結
1. ArrayList: 查詢快,增刪慢.
2. LinkedList:查詢慢,增刪快.
3. HashSet:底層采用哈希表結構,查詢快,增刪快.
4. LinkedHashSet:底層采用鏈表,哈希表.查詢快,增刪快,有序的.
5. HashMap:底層采用哈希表結構,查詢快,增刪快.
6. LinkedHashMap:底層采用鏈表,哈希表.查詢快,增刪快,有序的.
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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